// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_FORMATS_MP2T_TS_SECTION_PES_H_
#define MEDIA_FORMATS_MP2T_TS_SECTION_PES_H_

#include <stdint.h>

#include <memory>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "media/base/byte_queue.h"
#include "media/formats/mp2t/ts_section.h"

namespace media {
namespace mp2t {

    class EsParser;
    class TimestampUnroller;

    class TsSectionPes : public TsSection {
    public:
        TsSectionPes(std::unique_ptr<EsParser> es_parser,
            TimestampUnroller* timestamp_unroller);
        ~TsSectionPes() override;

        // TsSection implementation.
        bool Parse(bool payload_unit_start_indicator,
            const uint8_t* buf,
            int size) override;
        void Flush() override;
        void Reset() override;

    private:
        // Emit a reassembled PES packet.
        // Return true if successful.
        // |emit_for_unknown_size| is used to force emission for PES packets
        // whose size is unknown.
        bool Emit(bool emit_for_unknown_size);

        // Parse a PES packet, return true if successful.
        bool ParseInternal(const uint8_t* raw_pes, int raw_pes_size);

        void ResetPesState();

        // Bytes of the current PES.
        ByteQueue pes_byte_queue_;

        // ES parser.
        std::unique_ptr<EsParser> es_parser_;

        // Do not start parsing before getting a unit start indicator.
        bool wait_for_pusi_;

        // Used to unroll PTS and DTS.
        TimestampUnroller* const timestamp_unroller_;

        DISALLOW_COPY_AND_ASSIGN(TsSectionPes);
    };

} // namespace mp2t
} // namespace media

#endif // MEDIA_FORMATS_MP2T_TS_SECTION_PES_H_
